"I have come close. I notice that during the week because I take the bus to work (to force myself to walk more, and I walk between 2.5 and 3 miles a day) and because I am physically active I crave water. I don't drink as much as I should on the weekends. I don't feel as thirsty. I need to dig out my other two large water bottles and fill all three in the morning. If I drink all three by the end of the day I will have had 72 fl oz."